Gurgaon water makes my hair brittle. What to do?

I have been living in gurgaon for the last 2 years and my hair quality has declined very badly.. i have trued ao many good products for my hair.. like minimalist maelic acid serum, love beauty planet masks.. so many good shampoos. But whenever i go back to my hometown and wash my hair.. my hair are smoother.. i have now drawn to the conclusion that it’s the water.

What to do?